Soil Freezing Model in the Presence of Underground Inclusion Using Hybrid Boundary-Finite Element Method

Ansari, Bahman; Moazzami, Alireza

doi:10.61882/NMCE.2511.1107

Soil Freezing Model in the Presence of Underground Inclusion Using Hybrid Boundary-Finite Element Method

Document Type : Research

Authors

Bahman Ansari

Alireza Moazzami

Department of Engineering, Faculty of Civil Engineering, University of Zanjan, Zanjan, Iran

10.61882/NMCE.2511.1107

Abstract

In this study, a hybrid boundary-finite element approach is proposed for solving nonhomogeneous soil freezing models, including internal inclusions. In this regard, by dividing the nonhomogeneous model into homogeneous parts and applying the hybrid element approach to each part, the resultant equations are combined using the continuity and consistency conditions at the interface boundaries. After introducing the discretized form of the equations using hybrid element approach, the implementation is carried out in a computer code and verified by solving several classic examples. Finally, a parametric study is conducted in which a soil layer containing circular and square-shaped inclusions is modeled using the proposed method, and the effects of freezing pipes placement, inclusion geometry, and soil properties on the freezing growth performance are evaluated. The results showed that the freezing pipe configuration, combined with the inclusion geometry installed outside the inclusion, provided more uniform and optimal freezing results in comparison to other configurations make it suitable for stabilizing underground tunnel walls in a nonhomogeneous soil layer.

Keywords

Soil Freezing

Underground Inclusion

Hybrid Solver

Boundary-Finite Element Method

Subjects

Geotechnical Engineering

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